Types of Toilets for Tiny Houses and Which is Best with Prices

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When you’re designing a tiny house, no decision gets debated more than the toilet. It affects your plumbing, your power budget, your maintenance routine, and, let’s be blunt, your daily quality of life. After comparing every major option on the market, here’s the full breakdown: four toilet types, real 2026 prices, and which one actually makes sense for how you plan to live.

Quick Tips Before You Buy

• Measure first. Most composting toilets need 19 to 22 inches of depth plus crank clearance. Measure your bathroom before falling in love with a model.
• Count total cost, not sticker price. A $1,000 composting toilet with no water hookup can beat a $300 flush toilet that requires a $3,000 septic connection.
• Know your power budget. Incinerating toilets draw 1,500 to 2,000 watts per cycle. That is a serious load if you’re on solar. Run your numbers in our tiny house solar calculator before committing.
• Check local codes. Some counties require a permitted septic or sewer connection regardless of what toilet you use.

1. Composting Toilets

How they work: Composting toilets separate liquids from solids. Solids go into a chamber with peat moss or coconut coir and break down naturally; liquids go into a bottle you empty every few days. No water, no plumbing, no septic.

Best for: Full-time off-grid living. This is the default choice in the tiny house community for good reason.

Pros: No water or sewer hookup, minimal power from a small vent fan, legal almost everywhere, and a 2 to 4 week empty cycle for two people.

Cons: Up-front cost, you handle the emptying, it needs a vent run to the outside, and there is a learning curve the first month.

Top Picks: 2026 Prices

• Nature’s Head – about $1,025 to $1,095. The gold standard; over a thousand reviews averaging 4.4 stars. Manual crank agitator, nearly indestructible.
• OGO Origin – about $950 to $1,000. Push-button electric agitator instead of a crank; smaller footprint than Nature’s Head.
• Cuddy Lite – about $750. Best budget pick; strong capacity-to-price ratio.
• Separett Tiny – about $900 to $1,300. Urine-diverting design, best when space is extremely tight; needs power for its fan.

2. Incinerating Toilets

How they work: Electric or propane heat burns waste down to a cup of sterile ash. No water, no compost handling. You just empty an ash pan every few weeks.

Best for: Cold climates, people who hate maintenance, and tiny house owners who have the budget and power to spare.

Pros: Cleanest user experience of any off-grid option, no smell when vented correctly, and works in freezing temperatures.

Cons: Expensive to buy and run. Each cycle costs roughly $0.80 to $1.00 in electricity or $1 to $2 in propane. The electric draw, usually 1,500 to 2,000 watts, can dominate a small solar setup. Check your system size first.

Top Picks: 2026 Prices

• Cinderella Comfort, electric – about $4,299 to $4,499.
• Cinderella Freedom, propane – about $4,499; the off-grid favorite since it sidesteps the electric load.
• Incinolet TR, electric – typically in the $2,000 to $3,000 range; the longtime US-made option.

3. Traditional and RV Flush Toilets

How they work: Exactly like the one in a regular house, which is the whole appeal. A flush toilet requires a water supply and a sewer, septic, or black tank connection.

Best for: Tiny houses parked permanently with full utility hookups, or backyard ADUs tied into the main house.

Pros: Cheapest hardware, zero learning curve, and guests never ask questions.

Cons: Useless off-grid. The hookup is the real cost. A septic install can run $3,000 to $10,000 or more. RV-style versions also need black tank dumping.

Top Picks: 2026 Prices

• Standard low-flow residential toilet – $150 to $400 at most hardware stores.
• RV gravity-flush toilet, Dometic or Thetford – $150 to $300, pairs with a black tank.
• Macerating upflush toilet, Saniflo-style – $700 to $1,200; lets you put a bathroom where gravity drainage cannot reach.

4. Portable and Cassette Toilets

How they work: A self-contained unit with a small freshwater flush tank on top and a sealed waste cassette below that you carry to a dump point or toilet to empty.

Best for: Weekend-use tiny houses, builds in progress, or as a backup.

Pros: Cheapest entry point, zero installation, and you can take it with you.

Cons: Small capacity, usually 2 to 4 days of use, chemical smell management, and nobody loves the emptying trip.

Top Picks: 2026 Prices

• Thetford Porta Potti 565E – about $180; electric flush, the comfortable one.
• Camco Standard 5.3 gallon – about $80 to $100; bare-bones budget pick.
• Laveo Dry Flush – about $700 to $800; bags waste with no water or chemicals; cartridges are the ongoing cost.

Price Comparison Table

Which Toilet Is Best for Your Tiny House?

• Full-time off-grid: Nature’s Head or OGO composting toilet. Proven, affordable to run, no infrastructure.
• Off-grid with a big budget: Cinderella Freedom propane incinerating toilet. This is the low-maintenance luxury route.
• Parked with hookups: Standard low-flow flush toilet. Don’t overthink it.
• Weekend cabin or build-in-progress: Thetford Porta Potti now; upgrade later.

Prices current as of June 2026 and subject to change. Some links on this page may be affiliate links. See our affiliate disclosure.